What Is Variable

Q

What is variable in Python?

✍: FYIcenter.com

A

A variable is symbolic name that can be assigned with a reference link to a data object resulted from an expression.

In Python, variables are not declared specifically for any data type. They can be used without declaration statements. For example, the following assignment statements defines variable "x" and assigned with an "int" object first, then changed to a "float" object:

>>> x = 1234
>>> x
1234
>>> x = 3.14159
>>> x
3.14159

Variable names must start with alphabetical letters or "_". For example, some invalid variable names are listed below:

3x 
"x"
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⇒ What Is Assignment Statement

⇐ Evaluation of Expressions

⇑ Expressions, Variables and Assignment Statements

⇑⇑ Python Tutorials

2018-03-13, 1740🔥, 0💬

What Is Expression
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What Is Assignment Statement
What is Assignment Statement in Python? An Assignment Statement is associates a reference of a data object resulted from an expression to a variable or to an item in a list or dictionary. Assignment statement has the following syntax: variable = expression After the data object is assigned to a vari... 2018-03-13, ∼1833🔥, 0💬

Statement Syntax and Execution Flow Control
Where to find tutorials on Python Statement Syntax and Execution Flow Control? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Python Statement Syntax and Execution Flow Control: Basic Structure of Python Code Multi-line Statements in Python Co... 2018-03-13, ∼1806🔥, 0💬

Expressions, Variables and Assignment Statements
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Evaluation of Expressions
How expressions are evaluated in Python? Expressions are evaluated in Python based on precedence of each operation list below: Operator Description -------- ----------- (expressions...), [expressions...], {key: value...}, {expressions...} Binding or tuple display, list display, dictionary display, s... 2018-03-13, ∼1751🔥, 0💬

What Is Variable
What is variable in Python? A variable is symbolic name that can be assigned with a reference link to a data object resulted from an expression. In Python, variables are not declared specifically for any data type. They can be used without declaration statements. For example, the following assignmen... 2018-03-13, ∼1741🔥, 0💬

'dict' Values are Objects
Are "dict" values objects in Python? Yes, "dict" values are objects in Python. In fact, all data values in Python are objects. In Python, "dict" is defined as an object class with the following interesting properties, constructors, and methods: dict.__doc__ - Property holding a short description of ... 2023-07-01, ∼1727🔥, 0💬

'list' Values are Objects
Are "list" values objects in Python? Yes, "list" values are objects in Python. In fact, all data values in Python are objects. In Python, "list" is defined as an object class with the following interesting properties, constructors, and methods: list.__doc__ - Property holding a short description of ... 2022-12-03, ∼1688🔥, 0💬

Comments in Python Code
How to enter comments in Python Code? There is only one way to enter comments in Python code. That is to enter them at the end of any code line preceded by the hash character "#". For example: # this is the first comment x = 1 # and this is the second comment # and now a third! ⇒ 'if ... elif ... ... 2023-06-12, ∼1659🔥, 0💬

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